I'm not sure where you got your info from but non-US cards have always had higher value due to limited supply. The value also depends on the type of info. For example, magnetic stripe data (dumps) is worth more than basic card info (which isn't worth much).
The botnet carding numbers were what I was quoting, not mag stripe dumps. And I was told it was the other way around, that US cards either had higher limits or the banks were more lenient with the credit? Seeing as Americans use credit cards way more than most countries, a multitude of charges would be more easily overlooked. But i'm pretty sure $50 per card is not a realistic rate, even if they're worth more than US cards.
